Anyone had it? I'm looking into it. Too many old sport injuries on the knees. I am still very active doing 4-5 boot camps per week. If I wasn't active, I would not need it. However, I like to remain active. I've already done cortisone & hyaluronic acid injections which help hide the pain. However, I'm looking for something additional to help prevent it. More specifically, I'm looking to postpone knee replacement as long as possible.